HKS Performance Parts & Upgrades

What This Collection Covers

HKS has built its reputation on Japanese sport compact and sports car performance since the late 1970s, developing turbo kits, exhaust systems, and suspension for platforms including the Toyota Supra 2JZ-GTE, Nissan Skyline GT-R RB26DETT, Nissan Silvia and 240SX SR20DET, and Subaru WRX and STI EJ and FA series engines. This collection brings together fitment verified HKS parts for these Japanese performance platforms.

JDM Platform Focus

HKS parts in this collection are engineered specifically around Japanese turbocharged and naturally aspirated sport compact and sports car platforms, and fitment does not extend to domestic muscle car applications.

Turbo Kits and Forced Induction

HKS GT series turbochargers and complete turbo kits are a benchmark upgrade for the RB26DETT, SR20DET, and 2JZ-GTE platforms, offering improved spool characteristics and higher flow capacity over factory turbos. Supporting hardware including blow off valves, wastegates, and turbo plumbing completes a full forced induction upgrade.

Turbo Sizing for Street and Track

HKS offers turbo kits sized for both responsive street driving and higher flowing track focused builds, so matching turbo size to intended use is an important step before ordering.

Cat Back and Full Exhaust Systems

HKS Hi-Power and Legamax cat back exhaust systems deliver the brand's signature deep, refined tone while reducing backpressure on naturally aspirated and turbocharged Japanese platforms. Full exhaust systems paired with turbo upgrades unlock additional flow for high boost applications.

Cat Back vs Full Turbo Back Systems

Cat back systems replace the exhaust from the catalytic converter back, while full turbo back systems replace everything from the turbo outlet, offering greater flow gains on heavily modified turbo builds.

Coilovers and Suspension

HKS Hipermax coilover systems sharpen handling on the WRX, STI, Silvia, and Supra with adjustable damping and ride height suited to both daily driving and track use. Coilover components and rebuild parts extend the service life of existing HKS suspension setups.

Street vs Track Damping Setup

HKS coilover damping adjustment ranges allow the same coilover to be tuned for comfortable street driving or firmer track oriented handling depending on the driver's setup.

Blow Off Valves and Boost Control

The HKS SSQV (Super Sequential Blow Off Valve) is one of the most recognized blow off valves in Japanese performance culture, releasing boost pressure with a distinctive sound while protecting the turbo from compressor surge. Boost controllers and wastegate upgrades round out a complete forced induction setup.

SSQV Series Differences

Different SSQV models are calibrated for different boost ranges and turbo sizes, so confirming the correct SSQV version for your specific turbo setup avoids under or over spring rate mismatches.

Engine Management and Electronics

HKS F-CON V Pro and EVC boost controllers give tuners precise control over fueling, ignition timing, and boost across the RPM range, which is essential for safely running upgraded turbos and injectors on built Japanese performance engines.

Standalone vs Piggyback Tuning

Standalone engine management offers full control over tuning parameters for heavily built engines, while piggyback boost controllers are a simpler option for moderate power upgrades on a factory ECU.

Top HKS Product Lines

• GT Series Turbochargers. High flow turbo upgrades for RB26, SR20, and 2JZ platforms
• SSQV Blow Off Valves. The brand's signature Super Sequential Blow Off Valve line
• Hi-Power Exhaust Systems. Cat back and turbo back exhaust for Japanese platforms
• Legamax Exhaust Systems. Quieter street focused cat back exhaust option
• Hipermax Coilovers. Adjustable coilover suspension for street and track
• EVC Boost Controllers. Electronic boost control for turbocharged applications
• F-CON V Pro. Standalone engine management for built performance engines
• Camshafts and Valvetrain. Performance camshafts for EJ, SR20, RB26, and 2JZ engines

How to Choose the Correct HKS Part

• Confirm the exact year, make, model, and trim (WRX, STI, Supra, Skyline, Silvia, 240SX)
• Match turbo kit sizing to your street or track use case and target horsepower
• Verify SSQV or blow off valve version matches your turbo and boost range
• Check whether a cat back or full turbo back exhaust suits your current build stage
• Confirm coilover damping range matches your intended street or track use
• Review whether a tune is required after installing forced induction upgrades
• Verify engine management compatibility with your ECU and sensor setup
• Check camshaft specifications against your compression ratio and turbo setup
• Confirm exhaust piping diameter matches your turbo outlet or downpipe
• Contact support if unsure about HKS part fitment for your specific JDM platform

Common Questions

Will HKS parts fit my Subaru WRX or STI?

Yes, HKS offers turbo kits, exhaust systems, coilovers, and boost control specifically fitted for EJ and FA series Subaru WRX and STI platforms. Always confirm exact year and trim compatibility on the product page.

What is the HKS SSQV blow off valve known for?

The HKS Super Sequential Blow Off Valve, or SSQV, is one of the most recognized blow off valves in Japanese performance culture, known for its distinctive sound and reliable boost release on turbocharged builds.

Do I need a tune after installing an HKS turbo kit?

Yes. A turbo kit upgrade changes airflow and boost characteristics significantly, so a proper tune through HKS engine management or a compatible aftermarket ECU is required for safe, reliable operation.

What is the difference between Hi-Power and Legamax exhaust systems?

Hi-Power systems are tuned for a more aggressive tone and higher flow, while Legamax systems offer a quieter, more refined street oriented sound while still improving flow over the factory exhaust.

Are HKS coilovers adjustable for both street and track use?

Yes, HKS Hipermax coilovers offer adjustable damping and ride height, allowing the same coilover setup to be tuned for comfortable daily driving or firmer track oriented handling.

Will HKS parts fit domestic muscle cars like the Mustang or Challenger?

No. HKS parts in this collection are engineered specifically for Japanese sport compact and sports car platforms like the Supra, Skyline GT-R, Silvia, and WRX, and do not fit domestic muscle car platforms.

What engine management does HKS offer for built engines?

The HKS F-CON V Pro is a standalone engine management system offering full tuning control for heavily built RB26, SR20, and 2JZ engines running upgraded turbos, injectors, and camshafts.

Can I run an HKS cat back exhaust without other engine modifications?

Yes, a cat back exhaust can be installed on a stock or lightly modified engine for improved sound and modest flow gains, without requiring a tune in most naturally aspirated applications.

How do I know which HKS camshaft fits my engine?

Camshaft selection depends on your specific engine code, compression ratio, and whether the engine is naturally aspirated or turbocharged. Confirm exact fitment on the product page or consult a tuner for a built engine.

How do I get help matching HKS parts to my Japanese performance build?

Contact Black Ops Auto Works support by phone, email, or live chat. Staff can help confirm fitment for HKS forced induction, exhaust, suspension, and engine management parts across Supra, Skyline, Silvia, and WRX platforms before you order.

Why Buy HKS Parts from Black Ops Auto Works

Black Ops Auto Works stocks 607 HKS SKUs across forced induction, exhaust, suspension, and engine management categories with real fitment data, competitive pricing, and support from staff who build these vehicles themselves. Products are filterable by year, make, model, trim, engine, and drivetrain to confirm the correct application before ordering.

For focused shopping, browse our Forced Induction, Intercooler Components, Exhaust Systems, Cat Back Exhaust Systems, Coilovers, Coilover Components, Torque Solution, and Injen.